JOHANNESBURG — South Africa's former world heavyweight champion Corrie Sanders died of wounds sustained in a shooting at a Pretoria restaurant where he was celebrating his nephew's 21st birthday, police reported Sunday. Three men burst into the restaurant on Saturday evening and fired randomly where the family were dining, shooting Sanders in the stomach and hand as he dived in front of his daughter to protect her. The 46-year-old died from his injuries Sunday morning. Police had originally said that Sanders had been there for his daughter's birthday but the owner of the restaurant clarified that later. “Michael's (the brother of the victim) son was turning 21, and Corrie was also there when they (the robbers) came,” Johan Bejager told the Sapa news agency. Sunette Sanders, the ex-wife of the former champion, told radio station 702 that he had died heroically. “I think he died a hero,” she said. “He was just protecting his girl because they were shooting. He was hit by the two bullets, one in the arm and the other one through part of the stomach.” Sanders retired in 2008 with an impressive record of 42 wins against just four defeats, with his most famous vicory being in 2003 when he won the WBO world heavyweight title by knocking out Ukrainian Wladimir Klitschko in the second round after putting him down four times. It was hailed as one of the greatest upsets in boxing history but Sanders was to find his brother Vitali a challenge too far when he challenged him for his WBC heavyweight title a year later with the fight being stopped in the eighth round. His death was greeted with shock by sportspeople round the world and glowing tributes flowed from former boxers as well as fellow South African sporting icons. “It's very sad,” Sanders' former trainer Harold Volbrecht told a South African radio station. “My heart is broken. It's just terrible. I can't believe it happened.” South African sports figures, television personalities and entertainers all paid tribute to the popular Sanders, who also was a single handicap golfer. “Shocking news about Corrie Sanders' death, gonna miss u Corras,” South Africa limited-over cricket captain A.B. de Villiers posted on Twitter from the World Twenty20 tournament in Sri Lanka. South African rugby player Morne Steyn wrote: “All the best for Corrie Sanders family and friends! We lost one of SA's legends! God Bless!” Olympic swimming champion Cameron van der Burgh added: “RIP Corrie. A champion of the World.” Born in Pretoria, Sanders began his professional boxing career in 1989 with a first-round TKO of King Kong Dyubele. Eighteen of the fast-starting Sanders' 31 career knockouts came in the first round. He claimed the South African heavyweight title in 1991, but his demolition of Wladimir Klitschko in Hanover in 2003 was by far his best and most famous fight. Sanders hung up his gloves in 2008 after being knocked out by Osborne Machimana for the South African heavyweight title — ironically in the first round. — Agencies